I'm the proud owner of a model 201 just like the picture on rluther's posts.
I had it restored by Robert Moog at Big Briar around 1994. It plays, though not as cleanly as a modern model. I was lucky enough to purchase a signature model Etherwave in 2000. My problem is that in spite of this wealth of instrumentation I have been frustrated in my attempts to gain any kind of proficiency of technique. I mean to say the damn things are hard to play!! Anybody got hints on learning to play?